Questions tagged [cisco]

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Cisco switch police bandwidth for IPv4 and IPv6 traffic

I am trying to limit the bandwidth of several VLANs on Catalyst 3750X (c3750e-universalk9-mz.152-4.E10.bin) and Nexus 3064PQ (n3000-compact.9.3.9.bin) switches without success... It is necessary to ...
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How to enable ip address for all ports in the Cisco IOS Web Browser

Good afternoon, how do i enable the ip address in webui for the cisco switch you can see the picture below ipv4 is unassigned, everything looks good with me.
2 votes
3 answers
663 views

Understanding Cisco standard access lists (Packet Tracer example)

Consider the following example: I have two networks (192.168.1.0 and 192.168.2.0) with one PC in each network (PC0 - 192.168.1.1 and PC1 - 192.168.2.1) and a router R0 with 2 interfaces connecting ...
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1 answer
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DOT1X: A practical case for ForceUnauthorized state

I have been working as a Network Engineer for almost 5 years now. I have never encountered a scenario where I would need to configure a Cisco switch port as ForceUnauthorized (DOT1X). According to the ...
2 votes
1 answer
57 views

OSPF routes are not advertised

routers with ASBR2 connecting to AREA 0 and 10 and ASBR1 connecting to area 0 and 20, there's no entry of routes in R1's routing table, help me out R1#sh run Building configuration... Current ...
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1 answer
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Dell OS10 equivalent of Cisco switchport access

hoping someone knows OS10 command structure :) In the Cisco world, if I want to create an access port and add it to VLAN 50 its simply: switchport mode access switchport access vlan 50 What would the ...
0 votes
1 answer
28 views

GNS3 - hosted or VM?

I know that there is a gns3 client that is installed in the operating system. but i see there is a gns3 for vm that gns3 for VM In a few words it is a virtual software to use it with a hypervisor It's ...
2 votes
1 answer
114 views

RIP routes are not being advertised

I have 2 routers(R3 and R4 connected with serial links). I have advertised my loopbacks with RIP ver 2. with 192.168.1.1/32 and 192.168.2.1/32 on R3 and 192.168.3.1/32 and 192.168.4.1/32 on R4. My ...
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2 answers
36 views

Cisco Packet Trace Access-List

i have make a network, an i have try to work with access-list but not working :( can anyone help me with this pls Pc1 can access server finance server web can be access from all pc and server ...
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troubleshooting - how to? [closed]

I have here 2 troubleshooting tasks my teacher intentionally made mistakes in. One where there is a fault with the switch (I have to find out why there is no remote connection to my switch2) and the ...
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2 answers
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How to deny ICMP from 1 host on the server - Cisco Packet Tracer

How I can to setup the server firewall to deny any ICMP traffic come only from host 1 while permitting the other. host 1 is a switch Vlan = 192.168.10.2/24 when I do Remote Ip = 192.168.10.2 Wildecard ...
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4 answers
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Cisco Core Switches - Identifying unused ports

I've started at a new site, and the server room is an absolute state - I want to get in and start removing unused patch leads, so that I can start to see what is available & to tidy up. There is ...
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1 answer
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I need help with Meraki AP configuration

Hello everyone i have this port gi2/0/41 was configured for work station and port gi1/0/18 is configured for Meraki Ap , i need to correct the configuration in port gi2/0/41 and make is as the same ...
1 vote
1 answer
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Cisco ASR1006 QoS on pppoe session: Police percent not supported - no bandwidth for percent calculation

I want to perform QoS on specific (or all the) L2TP sessions that establish on ASR1006 router (LNS). What I have managed already is to set a police at a specific rate for a class that matches access-...
0 votes
1 answer
77 views

In gnss3, why can't I ping my cisco router from my VM?

I have the following network, I have never configured a Cisco router before so I'm having a little trouble. In router R1 I used the following commands to assign an ip to the router: configure terminal ...
3 votes
3 answers
468 views

How does a router decide what route to forward a packet when routes come from different routing protocols?

I'm a little confused. I know how the best route makes it to the routing table, but what process does the router follow to choose a path to forward a packet if, for example, you have something like ...
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Port suspended (No LACP PDUs) nx 9k switch -> C220 m5 ucs

We are setting up 2 nx 9k switches with port channel (LACP) enabled so we can have multiple links for redundancy. The two links in questions is eth1/3 on both switches going to UCS MLOM ports. We are ...
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1 answer
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VLAN and firewall interconnection

I'm encountering some difficulties to connect some VLANs to a physical firewall. In details I have a core network with a L3 switch as a router and some L2 switches as access network. The network is ...
1 vote
2 answers
51 views

Spanning tree loop prevention

Can I get some advice on what STP features to enable as best practice please, mainly to mitigate loops? In the past a user mistakenly connected two floor ports together causing a loop. Below are the ...
2 votes
3 answers
66 views

Stackpower - hot pluggable?

I need to add a C3850 switch to an existing switch stack. I know I can unplug a stackwise cable from the stack without problems, but is it the same with stackpower cables ? All switches have at least ...
0 votes
1 answer
33 views

how to limit or block broadcast traffic on ASR920 service instance EVC

I don't want to turn off all port, I want to block completly broadcast traffic, or the best to limit rate to 500 pps broadcast, all more to drop. Is there any way to do it on Cisco ASR920? I have ...
0 votes
1 answer
570 views

How do I bridge a Cisco 860VAE-W from VDSL to Ethernet?

I've got a Cisco 860VAE-W which I'm trying to bridge. I picked it up because I was interested in learning a bit about an IOS device – I'm coming at this pretty raw. >show inventory NAME: "C867VAE-...
-1 votes
1 answer
130 views

link asa with core switch to wlc

have 4 switch 3560 POE-8 , 2 of them have been RESET, AND w l c 2100 RESET too, but there are firewall AND ONE switch. Keeps the OLD CONFIG. I try to restore the network to the same old ...
1 vote
1 answer
28 views

I upgraded a Cisco switch to a newer model with different SNMP OIDs. Can I have the new switch receive the old OID and report values from the new OID?

I upgraded from a Cisco SG300-10MP to a Cisco SG350-10MP. A piece of software is looking for the value from 1.3.6.1.2.2.1.8.50, but the OID on the new switch is 1.3.6.1.2.2.1.8.2. The final number ...
0 votes
1 answer
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What is the ssd LUKS file on the (boot)flash of newer 9k Catalyst switches?

On a couple of our recent Catalyst 9k switches running IOSXE 17.3.x we've noticed a file with the name 'ssd' on the (boot)flash: filesystem. switch#dir flash: Directory of flash:/ 270353 -rw- ...
1 vote
2 answers
9k views

Switch 3550 password default password

What is the Cisco 3550 default password? I lose the password due some power outage while I was programming. I did reboot, and try the recovery password but doesnt work.
0 votes
2 answers
82 views

How to configure a layer-3 switch for routing between VLANs?

I have set up the router as a dhcp server and I would like to use the layer 3 switch to route each PC in seperate vlans. How do I configure the router and L3 switch for inter vlan routing ? the router ...
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0 answers
24 views

Connecting 9 Remote Sites with VPN Tunnels

I am working in a Cisco ecosystem and need to be able to test a 9 tunnel IPSec network over the internet using 10 x Cisco 1941 routers. This is a "hub and spoke" type configuration; where ...
2 votes
2 answers
110 views

How to configure a router as a dhcp server for vlans through a Layer 3 switch?

I would like to know what commands to type in the different switches and the router to to make the router function as a dhcp server for each PC in seperate vlans . I know to create the dhcp pools in ...
0 votes
1 answer
208 views

Unknown cause of disappearing CAM table entry and unicast flooding

Posting this in response to the closed question: Network flooding without ff-ff-ff-ff-ff-ff (layer 2 broadcast) MAC address in destination? I have a network that is experiencing the following problem: ...
2 votes
1 answer
829 views

How do I split static IPs from an ISP for separate usage?

I have a lot of IT experience/consulting, but want to test what I have done against some of the real experts hre in the networking field so I can keep learning and do what's best. I have ISPs with 5 ...
3 votes
5 answers
184 views

Cisco N9K - Down an interface in response to another interface going down?

I currently have my transit providers plugged directly into my router. I really like this arrangement because when the ISP goes down this typically downs the interfaces which results in BGP peering ...
0 votes
2 answers
109 views

Question about subinterface DHCP relay CISCO

I want to make 4 PC got DHCP IP address No problem with left side, but right side 2 PC can't get IP automaitic. I think the problem is DHCP Relay. How can I use ip helper-address for subinterface of ...
1 vote
1 answer
37 views

Command for interface uptime

Is there any command to find out how long a particular interface has been up on a cisco switch ?
3 votes
1 answer
45 views

Two multicasts from same source not reaching a destination

I have a single multicast source (Server A) sending to destinations 239.0.0.226 and 239.0.0.227, the source being directly connected to Switch A on VLAN 100. Switch A is sending dozens of multicasts ...
0 votes
1 answer
43 views

How can i create this topology in cisco packet tracer?

How can i create this topology in cisco packet tracer? wiil be it look like this?
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1 answer
192 views

Cisco ASA 5516-X Wont communicate on inside interface at all. No packets

I'm configuring a brand new ASA and the Firewall refuses to communicate on my inside interface. No matter the traffic type, its denied by implicit deny every time. I was hoping to get some feedback/...
4 votes
3 answers
2k views

How do I stop %C4K_EBM-4-HOSTFLAPPING message for wireless ports, but leave on for STP issues?

I do not have a spanning tree loop. I work in a manufacturing environment and roaming is prevalent. I don't want to see mac flaps or host flap messages on the wireless ports, I only want them for STP. ...
0 votes
1 answer
64 views

HP 6120XG switch LACP is blocked - error condition

Folks, I am dealing with very strange issue related LACP and not sure if its bug of 6120XG switch or something else. so let me explain my issue here. Network Diagram: I have two Cisco Nexus 9396PX ...
7 votes
3 answers
668 views

Can I announce the same block of /24 given to me by ARIN at two different locations?

The setting: Two locations I'm trying to connect. I have a /24 address block from ARIN Both location have the Same ISP. The Question: Can I announce the same /24 address block at the HQ location to ...
1 vote
1 answer
3k views

Cisco ASA VPN disconnecting regularly random time

We have Cisco ASA VPN IPSec with Sonicwall but we are seeing randomly after 8 hours or sometime 10 hours. I am unable to trace issue so just wonder is there a simple setting to renegotiate tunnel ...
0 votes
1 answer
38 views

ws-c3750x-48pf-s v02 not booting after password reset procedure

I tried to do a Password Reset Procedure on ws-c3750x-48pf-s v02 - 48-Port PoE, but at the end of the procedure the switch no longer works after multiple restarts and pressing the mode key, I always ...
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0 answers
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Access point 9130AX Vs 9120

I reviewed both access points datasheet 9120 and 9130 I found out both have same coverage and the only one different that I noticed is 9130 has the 4x4 2.4GHz and 4x4 5GHz which it's dual mode 8x8GHz, ...
1 vote
1 answer
39 views

show ip ospf neighbor unexpected results On packet Tracer

I made a small separated networks on packet tracer and used OSPF protocol to route between networks. Although The connect is Successful when I write 'show ip ospf neighbor' Command in CLI router X ...
2 votes
0 answers
59 views

Cisco Access Switches: Monitoring AAA server dead via SNMP?

This is a new setup of Cisco access switches (2960S, 2960X IOS with 15.2(2)E9, but mostly C1000 with IOS 15.2(7)E*), with a Cisco ISE 3.0 as authentication server for 802.1X, config style is to be ...
1 vote
1 answer
325 views

MAC address table and frame forwarding on Layer 2 switches - question about when two computers are connected via hub to same switch port

My apologies if this is not the right forum to ask this, but I am a newbie when it comes to networking. I am currently going through the CISCO Networking Essentials course, and one of the Activities ...
0 votes
1 answer
245 views

Ping to default gateway failing

I am trying to ping to a default gateway which i have configured as 171.2.0.1 but somehow the ping is failing . I am new to network domain so i have less idea about it . Any help is appreciated .This ...
35 votes
3 answers
21k views

What is "oversubscription" in Networking?

I have a question about oversubscription in networking. I read a lot of documentation but I still don't understand what it means. I read the following on the Cisco website, oversubscription of the ...
1 vote
1 answer
135 views

Help with network topology

We have several old Cisco switches (currently only have VLAN 1 for everything). We are moving to a VOIP setup with Brocade and so I've (hopefully) configured the Brocade switch to handle the traffic ...
1 vote
1 answer
98 views

Cisco ISR 4000 series with SM-X Layer 2/3 module

I have a Cisco SM-X-16G4M2X Layer 2/3 Service Module installed in an ISR 4000 series router, and I would like to configure its ports as level 2 in a vlan, and then configure that vlan with an IP ...

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